David Rubenstein — the billionaire philanthropist and co-founder of the Carlyle Group — interviewed four of the six living presidents for "The Highest Calling," his new book out Sept.

Rubenstein is co-founder and co-chairman of The Carlyle Group, one of the world’s largest and most successful private investment firms ... making the Rubenstein Arts Center, David M. Rubenstein Rare ...

Rubenstein Rare Book & Manuscripts Library. He has also funded the University’s Innovation & Entrepreneurship Initiative and the David M ... s largest private investment firms — managing ...